Driving of spindles.



P.- SCHLITTE.

DRIVING 0P SPINDLES. APPLIOATION FILED MAR. 1a, 1913.

Patented Apr. 7, 1914.

v i in imme/2am 0., WASHINGTON n c PATENT PAUL SCI-ILITTE, or LEIPZIG, GERMANY.

DRIVING OF SPINDLES.

Specification of Letters Patent.

Patented Apr. *7, 1914:-

Application filed March 13, 1913. Serial No. 754,096.

;. Germany, have invented certain new and useful Improvements Relating to the Driving of Spindles, of which the following is a specification.

This invention relates to means for uniformly tensioning the driving belts, ropes or the like for spinning machines, by employing resilient means arranged at a definite distance from the driving drum for assisting in the knott'ing of the band, cord or the like.

It i of the utmost importance in spinning machines that all the belts or driving members have the same tension, because the lack of uniformity in the tension, produces lack of uniformity in the friction, and the spindles are driven at different speeds. Accurate measurements have been taken and these have shown that by the methods hitherto usually employed for tensioning the driving members, considerable differences in tension result. It has already been proposed to employ a resilient knotting device when tying the knots of the driving bands. This known device has stretched one end of the band to a definite point. This method does not tension the entire band and was not therefore calculated to satisfy the object in view, namely to give a uniform tensioning of the tied bands. This particular object is sought to be obtained by the present invention.

According to this invention, the entire band or loop is placed under the tension of a resilient device when knotting or joining the ends. This is obtained by passing the band around the driving member or drum and leading it around the resilient device and then tying the ends of the loop. The tension applied when tying the ends is such as to stretch the tensioning member, and this stretching should always remain uniform, a result capable of being obtained by arranging that the resilient member is always drawn back to a definite point. In this way the length of the loop and consequently its tension after being fixed on the spindle whirl is always practically the same.

The device used for operating on this method may be very simple. Preferably it consists of a flat spring fixed at a definite distance from the driving drum and over the free end of which the loop is knotted. A catch is preferably inserted within the path of the spring when it is tensioned and this catch snaps behind the spring as soon as the same has been pressed back by the loop or band to a definite position. As soon as the spring snaps behind the catch the ends of the band are tightly tied and thereby sufficient accuracy for all practical purposes is obtained for the length of the band. The resistance of the resilient member may be obtained in any other way, as for instance by helical springs, weights or the like which act on the tensioning body. It is also evident that other means may be employed for jfixing the position to which the tensioning member has to be pressed back. When using metal spindle whirls, the groove after a short time becomes smooth and polished and it is no longer able with surety to drive a spindle through the band. In order to obtain uniformity in the drive by the band knotted and tensioned uniformly as above, it is advisable to employ instead of metal whirls, spindle pulleys which are made of tightly packed or wound strips of paper or like substance such as papier mach, carciboard or the like. Owing to the fibrous nature of the paper, the surface or groove of the whirl is always rough and the friction between the band and the whirl always adequate. As the paper or fibrous matter is not capable of taking on a polish the same remains equally eflicient during the whole term of its use and in consequence the adhesion between the belt and the pulley is always uniform. The wear on the pulley and belt is very small, as the tough nature of the paper and the tight packing of the separate layers prevents such wear. The soft nature of the paper fiber also prevents the band being broken or unduly worn by the action of the belt or spindle whirl. The lightness of the paper whirl proves of advantage in giving a uniform drive as the small mass responds more quickly to the accelerating force applied when setting the spindles in motion.

One form of the invention is shown in the accompanying drawings in which Figure 1, is a front View, and Fig. 2, a side view of the tensioning device, Fig. 3, is a side view and Fig. 4, a section of the spindle whirl.

In carrying the invention into effect according to one form, a tensioning device is arranged alongside the spindle a, and its whirl o. This tensioning device is arranged on the side of the spindle remote from the drivingdrum and consists of a fiat spring Z), with its upper free end arranged so that it canbend toward the spindle a. This fiat Spring is firmly fixed at its lower end and at its upper end it is provided with a catch or hook like part c, in which the cord or band 9, is inserted when its ends have to be tied. This catch 0, is so arranged that when the spring is deflected rearwardly in the direction of the arrow, the cord or band 9, will not slip off. To the rear of the spring there is arranged a catch cl, which is snapped by a spring 6, in front of the flat spring Z2, when this spring has been deflected by the tension of the cord 9, to a fixed point, where by the spring I) can not fly back into its initial position. In this rear position, that is to say, when the catch (Z, has snapped over the spring 6, the knot is tied. This method of holding the spring 5, also permits of the knot being tied securely and easily. As soon as the knot is tied the loop g, is removed from the catch 0, and passed over the whirl '0, into the groovethereof. The

catch d is then moved back by the handle 7, so as to permit the spring'plate Z) to assume 7 its normal position.

The spindle whirl 'v, as mentioned above,

is formed of fibrous strips wound tightly and pressed together. These stripsmay, if"

desired, be caused to adhere by means ofa suitable adhesive. The spindle is passed through a central bore h, and the groove 2', is formed of'V-shape to receive the driving .band 9. The central bore may belined or side plates may be added if'desired to fortify the paper.

Having now particularly described and ascertained the nature of mysald invention and in what manner the same is to be performed,

'I declare that what I claim is and a spindle whirl, a spring tension armlocated at the side of said spindle, means'for fixing said spring at one end'a'nd a spring controlled catch provided with aphandle for stopping at least the outward movement of said arm and tension-to a fixed amount.

In testimony whereof I aifix my signature in presenceof two witnesses.

' PAUL SGHLITTE.

Witnesses:

RUDOLPH FRIO E, Doms KRAHL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

